<html>
<head>
<style type="text/css">

    #colset {
      height: 2in;
      -moz-column-count: 3;
    }
    #container {
      position: relative;
    }
    #overflow {
      position: absolute;
      height: 5in;
    }
  
</style>
</head>

<body onload="document.getElementById('container').style.counterIncrement = 'foo';">
<div id="colset"><div id="container"><div id="overflow"></div></div></div>
</body>

</html>
